What 977 owners told NHTSA about the 2015 GMC Yukon Denali Xl 1500

Defective wire harness between 2 body control modules, causing alarm to go off repeatedly "Service Trailer Brake System" and also "Stabilitrack" will come on randomly and lock my brakes up and all of the features in my dash. This has been very scary to drive and has brought the vehicle close to collision more than a handful of times now.

NHTSA ODI 11618127

I keep getting a warning on my display on dash about my trailer brake system is not working. Also my temperature gauge stops working and I have to take off negative cable on battery to reset it. Temperature control sensor has been replaced but the problem still continues to happen.

NHTSA ODI 11617294

1) Wiring harness to the wireless charging pad on the center console that is wired through the door hinge. Shorts out when opening or closing center console. 2) Caused a fire that led to smoke and melted components inside center console hinge. Caused smoke and awful plastic burning smell while my kids and I were parked. I had just started the vehicle. My two kids and I had to jump and run from the vehicle. 3) No, but by many forums that dealers and mechanics are aware of this issue and charges you hundreds to fix it when it is MANUFACTURE ERROR. 4) This vehicle has been inspected many times. By all the other inspection laws Missouri has in place. How has it gotten passed many times with this known issue? 5)NO! This put mine and my kids life at risk. It is a known and wide issue yet no one takes this seriously. As it just affected me and my two children, I hope this is taken seriously. Hold manufactures responsible and dealers for selling vehicles with these known issues. Protect people.

NHTSA ODI 11601995

Air intake stayed on after shutting vehicle off and locked. It seemed it was in auto start mode from the key fob. Now it is hesitating to go and struggling to switch gears. Local mechanic is unable to pinpoint issue. Will bring to GMC dealership next. The rear camera intermittently works. If you open and close it sometimes it will fix it. USB ports intermittently work. Both taillights had to be replaced due to intermittently going out. Both front heated seats only work on top.

NHTSA ODI 11570072

Trailer service alert

NHTSA ODI 11555277

My car is giving me all kinds of warnings, parking assist off, rear back up, trailer brake, the radio sounds go off, blinker sounds go off, while trying to park power steering locks up, it will die in the middle of a turn. It’s doing everything The 2015 recall was created for. I do not think my car was fixed during the recall period. It is very hazardous.

NHTSA ODI 11542538

Consuming a lot of oil, makes a funny clicking noise sometimes when accelerations, had lil pieces of metal in my oil, Transmisson problems, 1 front headlight and all rear tail lights went out, trailer brake system would come on and go off now it won’t stop dinging and makes a whole bunch of other lights come on (trailer brake system, park assist, low brake fluid, traction control, collision) dings some much I can’t drive it. Called a gm shop near me and they told me it would cost a whole bunch for each diagnosis for every warning that came on.

NHTSA ODI 11537059

When turning left the vehicle locks up and turns off, after that messages about the parking assist and versatrack starts popping up.

NHTSA ODI 11521812

Driving at a normal speed around 30 mph when vehicle suddenly becomes hard to steer as if the power steering just cut out or off therefore making it extremely difficult to control the vehicle and felt like a rough ride while this is taking place.....Definitely sounds like a safety issue......DASH READING WARNING SERVICE PWWR STEERING

NHTSA ODI 11515024

My vehicle Has a Service Trailer Brake System notification in my dash that dings as well. It does it on cold mornings with no trailer attached. I don’t trailer often.

NHTSA ODI 11495487

Trailer assist error. Brakes not working. Ac compressors been replaced and the fan runs after the vehicles off and ac only blows warm air

NHTSA ODI 11486969

Both tail lights work intermittently. Short in wiring ?

NHTSA ODI 11484996

My "Service Trailer Brake System" messages comes on periodically for days at a time with and without my trailer. The loud chime rings consistently for the duration of the drive. It makes driving unbearable. When connecting my trailer to it, the brakes do not seem to function correctly when towing. This is very dangerous. I found out that a lot of my fellow GMC SUV drivers have the same problem.

NHTSA ODI 11479248

The engine turns off when driving. This has happened at least 50 in the 2 years I've owned the vehicle. It has been serviced at Garland Shelton GMC in Temple, TX. The issue is not fixed. The battery and the negative cable have been replaced. When the engine dies none of the electrical works until I open the hood and wiggle the negative battery cable.

NHTSA ODI 11477185

Trailer break system warning keeps appearing.

NHTSA ODI 11475536

The contact owns a 2015 GMC Yukon Denali. The contact stated that while driving the air condition system was blowing hot air and then became inoperable. There were no warning lights illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that the A/C condenser and A/C control module needed to be repaired. The vehicle was not repaired. The manufacture was not notified of the failure. The approximate failure mileage was 75,000.

NHTSA ODI 11462781

Trailer Brake connection gives errors. Has been fixed multiple times with dealer with error still occurring

NHTSA ODI 11449860

Steering locks up at lower speeds or when turning into a parking lot all the ligths shut off at the same time the steering does it has happened more at night lights flicker both interior lights and exterior lights a/c shuts off radio shuts off i have went to different dealers and have not been able to fix this problem even doh i show them videos of what it does both my wife and i have almost had a few accidents because of this

NHTSA ODI 11439035

The problem initially started around August 19th when my daughter was driving the SUV. It started suddenly flashing multiple service problems ex trailer brake service, park assist service and stability track service. It started flashing them over and over every second and the engine would rev up then slow down which continued even after she was able to pull over and get it into park. It was terrifying for her. We had the vehicle towed to GMC. GMC felt the electrical problems were due to the fuse box so they replaced the entire fuse box and changed all the fuses. Last week, my daughter again was driving home on the highway and the vehicle started doing the same warning but also displayed several more warnings and the car was lurching forward and slowing down over and over again despite trying to maintain a safe speed. She was close to home and thankfully made it safely home. I drove the car the next morning a few miles to see what was going on and it started doing the same thing with alerts, servicing cycling through the dashboard and the speed and rpm kept revving up and slowing down, I could not maintain a steady slow speed as it seemed like the car was braking every few seconds so it kept lurching forward out of control. We had the car again towed to the same GMC. This time GMC changed out all the battery cables going to and from the batter itself. My husband picked up the car a few days later after being told the problem had been fixed. Within a couple miles of leaving the dealership (and thankfully before getting on the highway) the car started again with the lurching, revving and continuous flashing of a multitude of service alerts/failures. GMC had the car towed back to the service center where it has remained as they run more diagnostic tests. We are concerned that there is a serious electrical problem that they have been unable to figure out on this vehicle which has put each of us at serious safety risk when trying to drive it.

NHTSA ODI 11438194

The contact owns a 2015 GMC Yukon. The contact stated that while operating the vehicle, the power steering malfunctioned causing the steering wheel to become very difficult to turn in either direction. The contact indicated that recently when the failure occurred the vehicle also shut off nearly causing a crash. The vehicle was taken to the local dealer who diagnosed that the battery cables needed to be replaced. The vehicle was not yet repaired. The contact indicated that the vehicle was previously serviced under the NHTSA Campaign Number: 18V586000 (Steering) however, the failure recurred intermittently. The manufacturer was notified of the failure. The failure mileage was 75,000.

NHTSA ODI 11437454

Driver side brake lights don't work again. This will be the 3rd time that I know of that this piece of equipment has been changed out.

NHTSA ODI 11432765

LED Brake Lights fail due to design error typically on both side of the vehicle. I have found multiple reports of a failure on a circuit board that was poorly designed. A copper tracing is very narrow and fractures due to vibration resulting in Brake Light failure. Because the entire module must be replaced the repair costs $800-$900 per side.

NHTSA ODI 11426400

LED brake light on drivers side fails to illuminate (noticed first at about 72,700 miles). Upon further research, this appears to be a recurring issue with 2015-2016 Yukon and Yukon XL vehicles. The LED taillight assembly is a sealed housing and the individual brake light bulbs are not replaceable. There appears to be a design defect that is causing premature failures of these assemblies, which results in a safety hazard because the driver does not receive any notification that the brake lights have failed.

NHTSA ODI 11424204

Drivers side tail light intermittently works, doesn't work all the time. Passenger side brake light stays on continuously, never changes.

NHTSA ODI 11421492

THE TAIL LIGHTS FLICKER AND SOMETIMES DON'T WORK AT ALL.

NHTSA ODI 11415052